package net.xi.news.controller.admin;


import net.xi.news.pojo.Tag;
import net.xi.news.pojo.Type;
import net.xi.news.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    //跳转到标签管理页
    public String tags(@PageableDefault(size = 5,
            sort = {"id"},
            direction = Sort.Direction.DESC)
    Pageable pageable,
    Model model){
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }


    @GetMapping("/tags/input")
    //跳转到标签输入页
    public String input(Model model){
        model.addAttribute("tag",new Tag());
        model.addAttribute("msg","标签添加");
        return "admin/tagsinput";
    }

    @GetMapping("/tags/{id}/input")
    //跳转到标签编辑页
    public String editinput(@PathVariable Long id, Model model){
        model.addAttribute("tag",tagService.getTag(id));
        model.addAttribute("msg","标签修改");
        return "admin/tagsinput";
    }


    @PostMapping("/tags")
    //提交标签新增
    public String post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        Tag t1 = tagService.getTagByName(tag.getName());
        if (t1 != null){
            result.rejectValue("name","nameError","不能重复添加分类!");
        }


        if (result.hasErrors()){
            return "admin/tagsinput";
        }

        Tag t2 =  tagService.saveTag(tag);
        if (t2 == null){
            attributes.addFlashAttribute("msg","添加失败！");
        } else {
            attributes.addFlashAttribute("msg","添加成功！");
        }
        return "redirect:/admin/tags";
    }

    @PostMapping("/tags/{id}")
    //提交标签修改
    public String editpost(@Valid Tag tag, BindingResult result,
                           @PathVariable Long id,
                           RedirectAttributes attributes){
        Tag t1 = tagService.getTagByName(tag.getName());
        if (t1 != null){
            result.rejectValue("name","nameError","你还没修改呢！");
        }


        if (result.hasErrors()){
            return "admin/tagsinput";
        }

        Tag t2 =  tagService.updateTag(id,tag);
        if (t2 == null){
            attributes.addFlashAttribute("msg","更改失败！");
        } else {
            attributes.addFlashAttribute("msg","更改成功！");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("tags/{id}/delete")
    //删除标签
    public String delete(@PathVariable Long id,RedirectAttributes attributes){

        tagService.deleteTag(id);
        attributes.addFlashAttribute("msg","删除成功！");
        return "redirect:/admin/tags";
    }



}
